CN213392612U

CN213392612U - System for diagnosing piston fault of drilling pump according to color change

Info

Publication number: CN213392612U
Application number: CN202022497336.7U
Authority: CN
Inventors: 段宏康
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-06-08
Anticipated expiration: 2030-11-03

Abstract

The utility model discloses a system for diagnosing drilling pump piston fault according to colour change, including colour sensor, computational equipment, display device, equipment fault alarm equipment, colour sensor is used for gathering the cooling water colour signal of the cooling piston water export in every hydraulic cylinder of drilling pump, and computational equipment is used for calculating the colour change of the cooling water of every hydraulic cylinder cooling piston water export, judges whether the drilling pump piston takes place to damage, and display device demonstrates the accurate position that the colour changes, and equipment fault alarm equipment reports to the police to piston fault having appeared. The utility model provides a according to colour change diagnosis drilling pump piston fault system can not only the piston running state in the real time monitoring drilling pump fluid end, overhauls the warning to the piston according to piston running state, has improved the security of monitoring personnel in the monitoring piston operation process moreover.

Description

System for diagnosing piston fault of drilling pump according to color change

Technical Field

The utility model relates to a petroleum engineering equipment field, concretely relates to according to colour change diagnosis drilling pump piston fault system.

Background

With the increasing drilling parameters of oil fields and the increasing requirements on the working performance of a drilling pump, the drilling pump is developing towards the directions of high power, large displacement and high pump pressure (two are large and one is high for short), and the problem that the service life of a hydraulic end wearing part is shortened is brought to the drilling pump, wherein a piston is one of the wearing parts, so that the frequency of replacing the piston is increased undoubtedly, and the replacement of the piston is a very difficult task in the maintenance work of the drilling pump; in order to meet the requirement of 'two big and one high' of the drilling pump, the number of cylinders of the drilling pump is changed from three cylinders to five cylinders, each cylinder is provided with one piston, and the more the hydraulic cylinders are, the more the pistons are, the more the frequency of replacing the pistons is increased. In the past, whether the piston needs to be replaced is judged by means of close-range observation of workers and a drilling pump, the judgment skill requirement of the workers is high, more importantly, the workers and the high-pressure drilling pump are observed in close range, personal safety risks of the workers are increased, if the experience of the workers in judging whether the piston is damaged in the operating state of the drilling pump is insufficient, the drilling pump is only stopped to operate, all the pistons are disassembled to be checked, and the workers often replace the pistons with new pistons each time the pistons are disassembled to reduce workload, so that the labor intensity and labor time of the workers are greatly increased, the number of consumed pistons is increased, and the operating cost of drilling is increased, and therefore, an automatic diagnosis system for the drilling pump pistons is urgently needed.

Disclosure of Invention

In order to can remote diagnosis which piston of a kind of bore hole pump which jar has damaged, the utility model provides a according to colour change diagnosis bore hole pump piston fault system, only need unpack apart the piston of diagnosing the damage alright, the piston that does not damage need not to examine, avoids that kind of original for reducing work load of workman, when taking apart the inspection piston, will also continue the piston that uses and change into new piston.

The system for diagnosing the fault of the piston of the drilling pump according to the color change is characterized by comprising a color sensor, computing equipment, display equipment and equipment fault alarm equipment;

the color sensor is arranged at the water outlet of the cooling piston of each hydraulic cylinder;

the computing equipment receives signals of the cooling water color sensors of the water outlets of the cooling pistons of the hydraulic cylinders, computes the color change of the cooling water of the water outlets of the cooling pistons of the hydraulic cylinders, and can determine an initial value on site under each working condition of the drilling pump.

The display equipment is a PC display or an HMI touch screen and displays the specific position of the color change of the cooling water of the water outlet of each hydraulic cylinder cooling piston calculated by the calculation equipment.

And the equipment fault alarm equipment performs sound alarm according to the abnormal condition judged by the computing equipment.

The utility model has the effects of can not only real time monitoring the piston running state in the drilling pump hydraulic cylinder, overhaul the warning to the piston according to hydraulic cylinder piston running state, improve the security of monitoring personnel in the monitoring piston operation process moreover.

Drawings

FIG. 1 is a schematic diagram of the operation of a borehole pump.

FIG. 2 is a schematic diagram of a system for diagnosing a borehole pump piston failure based on color change.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

The embodiments of the present invention are not limited to the following embodiments, and various changes made without departing from the spirit and scope of the present invention are within the scope of the present invention.

Referring to fig. 1, the borehole pump is driven by external power to rotate a crankshaft, and then the rotation of the crankshaft is converted into the reciprocating motion of a piston through a connecting rod and a crosshead, and the main working mechanisms of the borehole pump are a reciprocating piston, an automatically opening and closing suction pump valve and an automatically opening and closing discharge pump valve. The space between the piston, the slurry acting surface, the suction pump valve and the discharge pump valve is called a hydraulic cylinder. The starting point and the end point of the piston are called dead points of the piston motion, the dead point far away from the crankshaft is a front dead point, the front dead point corresponds to the rotation angle of the crankshaft and is 0 degree, the dead point near the crankshaft is a rear dead point, and the rear dead point corresponds to the rotation angle of the crankshaft and is 180 degrees. One drilling pump only has one crankshaft, but a plurality of hydraulic cylinders are provided, the number of the common hydraulic cylinders is 3 and 5, the common hydraulic cylinders are respectively called as a three-cylinder drilling pump and a five-cylinder drilling pump, and each hydraulic cylinder has one piston.

The drilling pump achieves the purpose of conveying mud by means of the periodic change of the volume in the hydraulic cylinder, when the rotation angle of a crank shaft is 0 degrees, a piston runs to a front dead center, when the rotation angle of the crank shaft is 180 degrees, the piston runs to a rear dead center, in the process, the pressure in the hydraulic cylinder is lower than the pressure outside the suction piston, a suction pump valve is opened, a discharge pump valve is closed, mud enters the hydraulic cylinder from the suction pump valve, and when the crank shaft rotates to 180 degrees, namely the piston moves to the rear dead center, the mud occupies the space of the hydraulic cylinder. This process is the mud intake process of the borehole pump.

The piston of the borehole pump is a rubber part, the performances of the rubber part at high temperature are rapidly reduced, the service life of the piston is greatly shortened, and therefore the borehole pump must cool the piston. The piston is cooled by installing a cooling water tank below the drill pump, pumping water in the cooling water tank to the cooling piston in the hydraulic cylinder according to the cooling piston water inlet path in the figure 1 by using a water pump, and returning the water for cooling the piston to the cooling water tank from a cooling piston water outlet when the piston moves from a front dead center to a rear dead center during the mud suction process of the drill pump.

When the crank angle is rotated from 180 degrees to 360 degrees (0 degree of the next cycle), namely the piston is operated from the back dead center to the front dead center, in the process, the suction pump valve is closed, the discharge pump valve is opened, the mud is discharged from the discharge pump valve to the hydraulic cylinder, the process is the mud discharge process of the drilling pump, because the mud pressure is very high in the mud discharge process, if the piston is intact, no mud passes through the sealing surface of the piston, the color of the cooling water at the water outlet of the cooling piston is the same as the color of the water in the cooling water tank, the color collected by the color sensor is used as the standard of the piston, if the piston is damaged, the sealing surface of the piston cannot be completely sealed, the high-pressure mud in the hydraulic cylinder flows out from the gap of the damaged friction surface of the piston to be mixed with the water for cooling the piston, and the color of the cooling water for mixing mud is changed, the color sensor collects a color that is different from the color of the standard cooling water when the piston is intact.

Referring to fig. 2, a system for diagnosing a failure of a piston of a drill pump according to a color change includes a color sensor, a computing device, a display device, and a device failure alarm device.

In the system, the color sensors are respectively arranged at the water outlets of the cooling pistons, namely 3 color sensors are arranged on 3 hydraulic cylinders, 5 color sensors are arranged on 5 hydraulic cylinders, and the color change of the cooling water at the water outlet of the cooling piston of each hydraulic cylinder is transmitted to the computing equipment.

In the system, the computing equipment receives signals of a cooling water color sensor of a cooling piston water outlet of each hydraulic cylinder, calculates the relative change of the cooling water color of the cooling piston water outlet of each hydraulic cylinder, can determine an initial value with normal color on the spot under each working condition of the drilling pump, and judges that the piston of the hydraulic cylinder is abnormal through the color change;

the display equipment of the system is a PC display or an HMI touch screen and displays the color change position of the cooling water of the water outlet of each hydraulic cylinder cooling piston calculated by the calculation equipment.

The system can diagnose which hydraulic cylinder of the drilling pump is damaged according to color change in a long distance, workers only need to disassemble the piston for diagnosing the damage, the piston without the damage does not need to be inspected, and the problem that the original piston which can be continuously used is replaced by a new piston when the piston is disassembled for inspection by the workers is avoided.

The system can monitor the running state of the piston in the hydraulic end of the drilling pump in real time, overhaul and alarm the piston according to the running state of the piston at the hydraulic end, and improve the safety of monitoring personnel in the running process of the piston.

The above detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge range of those skilled in the art, and all these changes belong to the protection of the present invention, and also belong to the protection scope of the present invention.

Claims

1. A system for diagnosing the failure of a piston of a drilling pump according to color change is characterized by comprising a color sensor, a computing device, a display device and a device failure alarm device;

the color sensor is used for acquiring a cooling water color signal of a cooling piston water outlet in each hydraulic cylinder of the drilling pump;

the computing equipment is used for computing the change relation between the color of the water outlet of each hydraulic cylinder cooling piston and the set initial color value and judging whether the drilling pump piston is damaged or not;

the display device displays the exact location of the color change;

the equipment fault alarm device alarms that a piston fault occurs in the drilling pump.

2. The system for diagnosing drill pump piston failure based on color change of claim 1, wherein the color sensor is installed one at each cooling piston water outlet of each cylinder.

3. The system of claim 1, wherein the computing device receives a signal from a coolant color sensor for each cylinder coolant piston water outlet, computes a coolant color change for each cylinder coolant piston water outlet, and determines an initial value for each of the plurality of well pump operating conditions in situ.

4. The system for diagnosing drill pump piston failure based on color change of claim 1, wherein the display device is a PC display or HMI touch screen displaying the specific location of the color change of the cooling water for each cylinder cooling piston water outlet calculated by the computing device.

5. The system for diagnosing a malfunction of a piston of a drill pump based on a color change of claim 1, wherein the device malfunction alerting device alerts audibly based on the abnormal condition determined by the computing device.